Variable-speed mechanism.



No.v 845,005. PATENTED FEB. 19, 1907. R. K. LE BLOND & W. F. GROENE.

APPLIU'ATIOH FILED NOV. 2, 1906.

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PATENTED IBB. 19, 19Q7.

R. K. LEvBLOND'n W. I'.v GROENE.

VARIABLE SPEED MEGHANISM. APPLICATION FILED NOV. 2, 1906.

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i the United States, residing at Cincinnati in i provements in Speed-Changing Devices, of.

UNITED sTATEs Y"PATENT ordnen RICHARD K. LE BLOND AND WILLIAM F. GROENE, vOF' CINCINNATI, OHIO,

N D MACHINE TOOL COMPANY A COR- y vAFuABLl-'zfselED MEQHANISM.

Specification of Letters Patent.

Patented Feb. 19, 1907.

Application led November 2, 1906. Serial No. 341,727.

To a/ZZ whom lit may concern:

Be it known that we, RIcHARD K. LEy

BLOND and WILLIAM F. GROENE, citizens of the county'of Hamilton and State of O '0, have .invented certain new and useful Im- Which the following is a specification.

This invention relates to that class of speed-changing mechanisms described in our United States Patent No. '788,658, dated i May 2, 1905, Wherein,`a's in this application,

the speed-changing devices are shown as applied to a lathe-head, whereby a number of different s eeds may be,v imparted to the lathe-spin le from a source of power moving at a constant speed.

Our present invention is designed lmore particularly with a view to increase the number of possible changes in the rate of rotationV .of the spindle with res ect to the constant speed of the power, an this We accomplish without increasin the size of'the'head or housing and, as wi l hereinafter appear, without multiplication of parts. The invention consists, inA particulars vof construction and combinations, which Will be described hereinafter in-detail and then particularly pointed out in the claims at the end of this specication.

In the accompanying drawings, wherein similar letters of reference are used to indieral views, Figure 1 is a vertical longitudinal section taken through a lathe-head embody.-

ing our improvements.

Fig. 2 a transl.- verse sectionon line 2 -2 of Fig. 1.v

Va sectional detail through the housing and 4main shaft, illustrating in elevation the primary shifting lever and its adjuncts; and Fig. 4is 'a diagrammatic view illustrating changes in position of the shifting levers to 'attain varying speeds` Fig. 5 is a transverse section on the'line 5 5 0l"v F ig.` 1.

The mechanism here shown corresponds in the main with that illustrated in our said prior patentl embodying a suitable housing A,

aving bearings in which are journaled a driving-shaft a transmission-shaft C, and the spindle D, carrying the loose sleeveE, all provided withvgears adapted for manipulation to transmit motion atgreater or less Fig. 3 is s eed from the dwing-Shaft B to the-Spindle on a stub-shaft M, properly secured in the housing A, and employed a pinion M2, keyed to said shaft adjacent to the pulley, to impart motion to the drivingshaft B through gearvb, keyed on the outer end thereof, as shown in Fig. 1; but we wish it understood that the general adaptation of our invention contemplates mounting the pulley M directly on the outer end of the driving-shaft, thus elirninat ing the shaft M and gears M2 and b, as will be, apparent. i f i The ldriving-shaft B is mounted in suitable bearings b b2, carried by or forming part of the housing, and securely keyed thereon is a sleeve B', provided with a longitudinal channel b3 to receive a' shifting blade b4, which is given longitudinal movement through en.

'gagement with a shifting collar B2, mounted on said shaft, said collar being shifted to give longitudinal movement to the blade by means of the' yoke B? and lever B4. (Shown in detail in Fig. -3 and in dotted linesl in Fig. l.) cate corresponding pants in'each of the sev-l 1 Mounted to rotate on the sleeve B are two sister gear-shells B5 andVA B, carrying gears b5 and b, these shells being conjointly archedcentrally and being provided internally witha locking-notch (see Fig. 2) to engage dogs B7, seated inv hollow lugs b7 in the 4sleeve B and adapted to be'projected therefrom into engagement with the locking-y notch of one or the other of the gear-shells, according as the shifting blade is moved in one direction or the other to lock one or the other of the gears t5 or Zi to the sleeve, and therefore to the shaft.

The sleeve E, which is loosely mounted on i 'thespindle, is provided with three fixed gears F G H of dili'erent diameters, the gears F and G being constantly .in mesh with the gears b5 and b, respectively, which normally run idle, being brought into action only on the shifting of the collar B? upon operation i 3o1sitioned as shown in Fig. 1 the shifting of the lever B4 to one limit or'the other of its movement.

The transmission-shaft- C, j ournaled be- .neath-the spindle, carries three gears I, J, 5 andf'K, splined to rota;e therewith, but shit,- Vgable longitudinally thereon to engage selectively the gears F, G, and H of loose sleeve E y Aot the spindle. Thelongirudinal shifLing of [the gears lI., J, and K on shaft C is in rheinlin the housing, (see Fig. 2,) the outer end of 'fwhichcarries an operating-handle While on the inner end is a pin m2, carrying a roller fata', projecting between the gears l and J. As

keyed.- v.The1transmission-shaft C is further 'fprovi'dedwith gears. L N therewith, but movable longitudinallyr of the i shaft, asin the case of the gears I, J, and K beforedescribed. These gears aredesigned Vv'tov'.inesh selectively with gears P, Q, 'and R, carried by a sleeve S,.keyed or non-rot azivel y "L secured tothe spindle, and are shifted into engagement Withlone or other of said gears `irl-"by means of a lever T, having a pin and roller similar to the pin x2 and roller on the lever X,eXt'ending between the gears L and X.

'3' l/Vith the operating-levers B4, X, and T poblade ,12" vhas projected a dog B7 in.o engagemem Y Withthe loclging'fnotoh of the gear-shell B,

Y r thereby locking they shell to the moving shaft.

. -and* sleeve and imparting rmaionthrough lgear b" to gear-G of the sleeve E, which, as stated', is roratably mounted-on the spindle. From gear G motion is transmitted through gear J to the transmission-shaft- C and thence A.through gears O and R to the spindle. ll'ith vthelever. Bf-at the central position of its l-thro'Wthe gears bfand b run idle; but u on .Y f movernent to one or the other limits o its v- 'movement one or the other of the gears b5 or b6 Will'be locked to and ro.a e with the shaftv Bfan'd being normally in mesh with gears F and G Will impari movement through these gears or through gear H, also `fasc on the lsleeve E, to that one of tliegears I, J, or K Which has been thrown by the lever X into vengagement therewith, thus r oa-.ing shaft C at gre'a'. er or less speed according to the gears selected to intermesh. Inthe saine manner the gears L, N, and O of shaft C are selectively thrown inio mesh with the ived gears 5 5 P, Q', and R of sleeve S, which is keyed to romany changes of speed to thespindle'th-rough 'the proper manipulation of the levers B4, X, and T, ais-is clearly indica.ed bythe diagram Fig, 4. It Will thus be seen tna; when the .levers B, X, and T occupy the relative posi- .tions indicatedv in Fig. 4 We may cause 'to be imparted to the spindle D eiglneen changes yin speed. A

" Having l thus fully described our invention O, splined to rota.e

tate With the spindle, thus admitting of 'i'ojstanoe shown attained by a lever X, pivoced.

What We claim as new, and desire to secure by Letters Patent of the nited States, is-

1. In a speed-changing device, a drivingshaft, selectable gears thereon, a transmissionshaft, a plurality of independent sets of shiftable gears thereon, a spindle, a plurality of iixed and loose gears thereon, and means for shifting the gears on the transmissionshaft.

2. In a speed-changing device, a drivingshaft, selectable gears' thereon, operative connections bet-Ween the selected gear and `the driving-shaft, a transmission-shaft, a plurality of independent sets of shift'able gears thereon, a spindle, a'plurality of fixed and loose gears thereon, and means for shifting the gears on the transmission-shaft.

3. In a speed-changing device, a drlvmgshaft, selectable loose gears thereon, means.

for locking any one of said gea-rs to .the driving-shaft, a transmission-shaft, a plurality of independent sets of shiftable gears thereon, a spindle, a plurality of xed and loose gears thereon, and means for shifting the gears on the transmission-shaft. f

4, ln a s eed-clnriging device, a drivingshaft, selectable gears thereon', atransmissionshaft, a plurality'of independent sets of shiftable gears thereon, a spindle provided at one part thereof 4with a loose sleeve and at another part- \vith a xed sleeve, iixed gears on said loose and fixed sleeves, and means for shifting the gears on the transmission-shaft. 5. In a speed-changing device, a driving-- shaft, selectable loose gears thereon, means for locking any one of said gears to the driving-shaft, a transmission-shaft, a plurality of independent sets of shiftable gears of varying diameters thereon, a spindle, a plurality of xed and loose gears of varying diameters thereon. and means fzr'shifting the gears on the transmission-shaft.

6. Tn a speed-changing device, a drivingshaft selectable loose gears thereon, means for locking any one of said gears to the drivingshaft, a spindle, aplurality of fixed and loose gears thereon, two of said loose gears being constantly in mesh with the gears of the driving-shaft, 4a transmission-shaft, a plu'- rality of sets of shiftable gears thereon, the gears of one set adapted to mesh with the loose gears of the spindle and the gears ol' another set adapted t-o'rnesh with the fixed gears ofthe spindle, and means for shifting the 4gears on the transmission-shaft. i

7. In a speed-changing device, a drivingshaft, selectable loose gears thereon, means for locking anyone of said gears to the driving-shaft, a spindle, a loose sleeve on one end thereof, fived gears onsaid loose sleeve, two of lwhich are constantly. in mesh with the gears of the driving-slmft, a sleeve fast to the other en d of the spindle, iixed'gears on said sleeve, a transmission-shaft, shiftable gears at one end of thetransmission-shaft adaptedV IOO IIO

to mesh with the Vgears on the loose sleeve of 4the-spindle,'sl1iftable gears on the other end of the transmission-shaft adaptedto mesh vwith the gears on the xed's'leeve of the spin- 5 dle,4 and means for shifting said gears.

8. In'a "speedehanging device, a driving-f shaft, a plurality of selectable gears thereon,

a spindle7 a loose sleeve thereon, a plurality' of gearscarried by said loose sleeve, two of Axo= 'which are in constant mesh with the gears of 'i' the'` driving-shaft, a transmission-shaft. shift- "able gearsthereon at one end ada ted to mesh with the gears on the spindle-s eeve, a

plurality of gears to the s indle, shiftxed t0 the spindle, and means for shifting the gears o'f the driving and transmission shaft, substantially as described.

In testimony whereof we affix our signa- 2o tures n presence of two Witnesses.

RICHD'.' K. LE BLOND. WILLIAM F. GROENE. Witnesses:

MASON P. PRITCHARD, G. A. PUGH. 

